WO2000069606A9 - Method and device for compressing wood - Google Patents
Method and device for compressing woodInfo
- Publication number
- WO2000069606A9 WO2000069606A9 PCT/SE2000/000976 SE0000976W WO0069606A9 WO 2000069606 A9 WO2000069606 A9 WO 2000069606A9 SE 0000976 W SE0000976 W SE 0000976W WO 0069606 A9 WO0069606 A9 WO 0069606A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wood
- compression
- piece
- plates
- press
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing
Definitions
- spring wood which comprises large air filled channels (lumen) in the cells, is the easiest to compress. These channels have thin cell walls, which can deform easily without damaging them.
- An object with the invention is to provide a method and system, which remove the problems stated at the introductory part of this specification.
- a device to provide the method is characterised by a) a piece of wood having standing annular rings perpendicular to the flat sides of the piece of wood; b) two plates having a fixed position in relation to each other and having a distance to each other adapted to the thickness of the piece of wood between its flat sides, and between the two plates the piece of wood is adapted to be placed; b) press means for compressing the piece of wood between its side surfaces in radial direction of the annular rings of the wood and with increasing compression power until a wanted compression has been obtained.
- FIG 1 illustrates a compression in accordance with a prior known method, described above
- FIG 2 illustrates schematically a first embodiment of a system according to the invention
- FIG 3 illustrates a second embodiment of a system according to the invention
- FIG 4 shows a diagram, by means of which the invention is explained
- FIG 5 illustrates a third embodiment of a system according to the invention
- FIG 6 shows a longitudinal section through a first embodiment of a press having feeding of a longitudinal timber of wood to be treated and batch wise compression of the wood
- FIG 7 illustrates a longitudinal section through a second embodiment of a press having feeding of a longitudinal timber of wood to be treated and continuous compression of the wood
- FIG 8 illustrates a longitudinal section through a third embodiment of a press having feeding of a longitudinal timber of wood to be treated and continuous compression of the wood.
- the wood 1 prepared in this way is placed between two plates 3 and 4.
- Each plate has a glossy surface turned towards the wood and preferably has a coating 5 and 6, respectively, providing a low friction to the wood.
- the purpose of having the glossy surfaces of the plates 3 and 4 is to give such as low force of friction from these plates as possible when the wood board is compressed during the compression to come.
- the distance between the plates 3 and 4 should be approximately as long as the thickness of the board. Preferably, the distance could be controllable, e.g. by means of a steering wheel or the like (not shown). It is also an advantage to be able to move away one of the plates 3. 4 during working moments with insertion of an untreated wood board and unloading of a treated wood board. However, the positions of the plates 3 and 4 are essentially fixed, when a wood board is placed between them in order to be treated.
- the piece of wood board can be attached, for example glued, on a fixating bed, e.g. a plate of wood 14.
- a fixating bed e.g. a plate of wood 14.
- This fixation may be made only directly on one side of the wood board.
- two compressed wood boards 1 , 1 ' could be attached on each side of the fixating bed in order to get symmetry such that the composite wood board does not bend.
- the fixating bed strives against the effect provided when the compressed wood board has a possible tendency to swell in the compression direction.
- the bed 14 should not be made thicker than that the glue is holding in on place, it should be so thin that it does not press itself away from the glue.
- FIG 3 illustrates that a piece of wood 10 before the compression could be sawn into radial sliced veneer (shown sparsely for clearness), which thereafter are laid one of top of the other between the plates 15 and 16. Thereafter the compression is provided from the edges, which results in hard veneer disks, which can be used for example to wear and tear layers on floors, kitchen shelves, kitchen shutters etc.
- FIG 5 shows that two triangular blocks 17 and 18 have been glued together such that the glued common block 20 has got standing annular rings.
- Two blocks 19 and 20 provided in this way have thereafter, having an insert 21 between them, been placed between fixedly placed plates 23 and 24. After that the blocks are compressed from the edges in order to get a harder and stronger material.
- the distance plates are not shown in FIG 6 since they are provided in front of and behind the section shown in the Figure.
- the plank is fed in through an opening in the right side of the Figure between a press arrangement having two longish pressure units 26 and 27 having different pressure forces along the plank 25.
- the plank is fed through the press arrangement in the direction of the arrow P5 and is then compressed more and more in the beginning (see the section from the beginning to BR1 in FIG 4). After that, the plank is exerted to a pressure, which increased in a lower rate (see the section between BR1 and BR2 in FIG 5). After that, the control unit (not shown in FIG 6) senses that the pressure should not increase any more the pressure is maintained constant in the end of the pressure chain along the plank 25.
- the pressure along the plank is here controlled to have different pressure power in dependence of the position along the press units. This is possible to make by means of the control unit in a way obvious for the person skilled in the art.
- the press units 26 and 27 could have a coating giving a low friction. This is advantageous even if the press is opened somewhat at each movement forward.
- a chain of press plates 27, 28 has been placed between a guide (work support) 29 and 30 each for the belonging press units 31 and 32, respectively, and the plank 25.
- the press plates 27 and 28 are fed in the direction of the arrows such that they help the feeding movement of the plank 27 through the press arrangement. In doing so the press plates do not need to be opened between the batch wise compression, and the pressure proceeding can be provided continuously.
- Each chain of press plates can be fastened to each other in a ring and be fed around as an endless band.
- an intermediate rigid metal bar 35 should be provided between the planks 33 and 34 in order to prevent the individual planks to get lasting distortion from its parallelepiped form.
- a stepwise fed press or a continuously working press which works with transversely fed pieces of work, which then are fed into the press by means of one of the fixed plates 3. 4, or 15. 16 or 23. 24 before that the position of this plate is fixed before the start of the press operation. This is shown in the embodiment according to FIG 5 but can be applied to anyone of the other embodiments. At the feeding in. one of the plates 23 is moved outwardly far enough to let the planks be fed in as shown. Thereafter, the plate 23 is moved back and is fixed to its position. The press feet 9 and 10 are thus not yet inserted in the way shown in FIG 5.
- the method according to the invention can be used for each kind of wood where it is a wish to increase its hardness and resistance.
- a corresponding increase of the tear- proof, compression strength and resistance to bending for the wood is provided in the similar way as described above for the hardness.
- the pieces of wood treated to be hard with the method according to the invention are principally thought to be used a floor covering.
- the hardness has been derived by compression sideways and thus not by compression from the flat sides.
- the E-module at tangential load, i.e. on surfaces along a radial plane is much lower than that on tangential surfaces.
- the manufacturing method according to the invention if it is used to making floor boards, thus gives an aesthetically attractive floor having its standing annular, narrow rings.
- the floors are also pleasant to walk on.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00931857T ATE251976T1 (en) | 1999-05-17 | 2000-05-17 | METHOD AND DEVICE FOR PRODUCING PRESSED WOOD |
AU49674/00A AU4967400A (en) | 1999-05-17 | 2000-05-17 | Method and device for compressing wood |
DE60005968T DE60005968T2 (en) | 1999-05-17 | 2000-05-17 | METHOD AND DEVICE FOR PRODUCING PRESTRESSED WOOD |
EP00931857A EP1202848B1 (en) | 1999-05-17 | 2000-05-17 | Method and device for compressing wood |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9901796-4 | 1999-05-17 | ||
SE9901796A SE515328C2 (en) | 1999-05-17 | 1999-05-17 | Method and apparatus for compressing wood |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000069606A1 WO2000069606A1 (en) | 2000-11-23 |
WO2000069606A9 true WO2000069606A9 (en) | 2001-03-01 |
Family
ID=20415632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2000/000976 WO2000069606A1 (en) | 1999-05-17 | 2000-05-17 | Method and device for compressing wood |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1202848B1 (en) |
AT (1) | ATE251976T1 (en) |
AU (1) | AU4967400A (en) |
DE (1) | DE60005968T2 (en) |
SE (1) | SE515328C2 (en) |
WO (1) | WO2000069606A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114147827A (en) * | 2021-12-14 | 2022-03-08 | 黄荣凤 | Solid wood layered compression method based on moisture distribution regulation and control |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3591448A (en) * | 1966-08-15 | 1971-07-06 | Armin Elmendorf | Wood with a densified surface layer and method of making same |
US4606388A (en) * | 1985-03-28 | 1986-08-19 | Peter Favot | Process for densifying low density woods |
SE505408C2 (en) * | 1994-05-06 | 1997-08-25 | Traetek Inst Foer Traeteknisk | Surface-cladding elements made of hardened wood and methods for making such elements |
WO1996005034A1 (en) * | 1994-08-15 | 1996-02-22 | Weyerhaeuser Company | Wood veneers and products therefrom having enhanced strength and stiffness |
SE9703776D0 (en) * | 1997-10-16 | 1997-10-16 | Lindhe Curt | New material and process for its preparation |
-
1999
- 1999-05-17 SE SE9901796A patent/SE515328C2/en unknown
-
2000
- 2000-05-17 AU AU49674/00A patent/AU4967400A/en not_active Abandoned
- 2000-05-17 DE DE60005968T patent/DE60005968T2/en not_active Expired - Lifetime
- 2000-05-17 AT AT00931857T patent/ATE251976T1/en active
- 2000-05-17 EP EP00931857A patent/EP1202848B1/en not_active Expired - Lifetime
- 2000-05-17 WO PCT/SE2000/000976 patent/WO2000069606A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
AU4967400A (en) | 2000-12-05 |
WO2000069606A1 (en) | 2000-11-23 |
DE60005968D1 (en) | 2003-11-20 |
EP1202848A1 (en) | 2002-05-08 |
ATE251976T1 (en) | 2003-11-15 |
EP1202848B1 (en) | 2003-10-15 |
DE60005968T2 (en) | 2004-07-29 |
SE9901796L (en) | 2000-11-18 |
SE515328C2 (en) | 2001-07-16 |
SE9901796D0 (en) | 1999-05-17 |
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